Siahaan, Joshua L., author
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Universitas Indonesia, 1985
UI - Skripsi (Membership)
Purwoko, author
Program Pascasarjana Universitas Indonesia, 2007
UI - Tesis (Membership)
Universitas Indonesia, 2010
UI - Skripsi (Open)
Universitas Indonesia, 2003
UI - Skripsi (Membership)